The long-range forecast for Ontario predicts a heatwave, with temperatures reaching up to 35°, significantly higher than typical for Ontario for this time of the year and 3.2 °C above the historical average.
Select a month and click on a day for more information:
Friday
May 1
24° / 12°
Saturday
May 2
23° / 11°
Sunday
May 3
23° / 13°
Monday
May 4
19° / 10°
Tuesday
May 5
18° / 11°
Wednesday
May 6
24° / 12°
Thursday
May 7
27° / 14°
Friday
May 8
29° / 16°
Saturday
May 9
31° / 17°
Sunday
May 10
33° / 18°
Monday
May 11
35° / 19°
Tuesday
May 12
35° / 20°
Wednesday
May 13
34° / 21°
Thursday
May 14
28° / 19°
Friday
May 15
26° / 16°
Saturday
May 16
23° / 14°
Sunday
May 17
24° / 12°
Monday
May 18
26° / 12°
Tuesday
May 19
27° / 13°
Wednesday
May 20
26° / 13°
Thursday
May 21
26° / 12°
Friday
May 22
26° / 12°
Saturday
May 23
26° / 11°
Sunday
May 24
25° / 12°
Monday
May 25
25° / 12°
Tuesday
May 26
25° / 13°
Wednesday
May 27
25° / 12°
Thursday
May 28
26° / 13°
Friday
May 29
27° / 13°
Saturday
May 30
28° / 14°
Sunday
May 31
27° / 15°
Ontario 30 days weather forecast
Check out our estimated 30 days weather forecast for Ontario, this data is based on the average weather in Ontario in the last few years.
For a more accurate and detailed forecast, check out the 14 day weather for Ontario next to the desired date.